If f : R → S defined by f(x) = 4 sin x – 3 cos x + 1 is onto, then what is S equal to?

If f : R → S defined by f(x) = 4 sin x – 3 cos x + 1 is onto, then

1.	If f : R → S defined by f(x) = 4 sin x – 3 cos x + 1 is onto, then what is S equal to?
A.	[-5, 5]
B.	(-5, 5)
C.	(-4 , 6)
D.	[-4, 6]
Answer» E.

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